CHARGING & STARTING SYSTEM
Page 2B-2 90-855347R1 JANUARY 1999
Battery Cable Size
If standard (original) battery cables are replaced with longer cables, the wire gauge size must increase. See
chart below for correct wire gauge size.
Battery Cable Length
Wire Gage Size
Battery Cable Wire Gage Size
Mercury/Mariner Outboards
Battery Cable Length
8 ft.
2.4m
9 ft.
2.7m
10ft.
3.0m
11ft.
3.4m
12ft.
3.7m
13ft.
4.0m
14ft.
4.3m
15ft.
4.6m
16ft.
4.9m
17ft.
5.2m
18ft.
5.5m
19ft.
5.8m
20ft.
6.1m
21ft.
6.4m
22ft.
6.7m
23ft.
7.0m
24ft.
7.3m
Models Wire Gage Size No. SAE
6-25 Hp
#8* #8 #6 #6 #6 #6 #4 #4 #4 #4 #4 #4 #4 #4 #2 #2 #2
30-115
Hp
#6* #4 #4 #4 #4 #4 #2 #2 #2 #2 #2 #2 #2 #2 #0 #0 #0
125-250
Hp (ex-
cept DFI)
#6* #6 #4 #4 #4 #4 #4 #4 #2 #2 #2 #2 #2 #2 #2
DFI
Models
#4* #2 #2 #2 #2 #2 #2 #2 #2 #2 #0 #0 #0
* = Standard (original) Cable Length and wire gage size.
Replacement Parts
WARNING
Electrical, ignition and fuel system components on your Mercury/Mariner out-
board are designed and manufactured to comply with U. S. Coast Guard Rules
and Regulations to minimize risks of fire and explosions. Use of replacement
electrical, ignition or fuel system components, which do not comply with these
rules and regulations, could result in a fire or explosion hazard and should be
avoided.
Recommended Battery
A 12 volt marine battery with a minimum Cold Cranking amperage rating of 750 amperes
or 1000 (minimum) Marine Cranking amperes should be used.
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